U.S. patent application number 12/309775 was filed with the patent office on 2010-01-07 for nickel-based alloy.
Invention is credited to Jutta Kloewer, Frank Scheide.
Application Number | 20100003163 12/309775 |
Document ID | / |
Family ID | 38626548 |
Filed Date | 2010-01-07 |
United States Patent
Application |
20100003163 |
Kind Code |
A1 |
Kloewer; Jutta ; et
al. |
January 7, 2010 |
Nickel-Based Alloy
Abstract
Nickel-based alloy, consisting of (in % by mass) Al 1.2-<2.0%
Si 1.2-<1.8% C 0.001-0.1% S 0.001-0.1% Cr 0.03-0.1% Mn 0.03-0.1%
Cu max. 0.1% Fe 0.02-0.2% Mg 0.005-0.06% Pb max. 0.005% Y
0.05-0.15% and Hf 0.05-0.10% or Y 0.05-0.15% and La 0.05-0.10% or Y
0.05-0.15% and Hf 0.05-0.10% and La 0.05-0.10% Ni remainder
together with manufacturing-related impurities.
Inventors: |
Kloewer; Jutta; (Iserlohn,
DE) ; Scheide; Frank; (Altena, DE) |
Correspondence
Address: |
JORDAN AND HAMBURG LLP
122 EAST 42ND STREET, SUITE 4000
NEW YORK
NY
10168
US
|
Family ID: |
38626548 |
Appl. No.: |
12/309775 |
Filed: |
July 6, 2007 |
PCT Filed: |
July 6, 2007 |
PCT NO: |
PCT/DE2007/001203 |
371 Date: |
March 5, 2009 |
Current U.S.
Class: |
420/443 |
Current CPC
Class: |
C22C 19/03 20130101;
C22C 19/058 20130101 |
Class at
Publication: |
420/443 |
International
Class: |
C22C 19/05 20060101
C22C019/05 |
Foreign Application Data
Date |
Code |
Application Number |
Jul 29, 2006 |
DE |
10 2006 035 111.8 |
Claims
1. Nickel-based alloy comprising, in % by weight: Al 1.2-<2.0%
Si 1.2-<1.8 C 0.001-0.1% S 0.001-0.1% Cr 0.03-0.1% Mn 0.03-0.1%
Cu max. 0.1% Fe 0.02-0.2% Mg 0.005-0.06% Pb max. 0.005% Y
0.05-0.15% and Hf 0.05-0.10% or Y 0.05-0.15% and La 0.05-0.10% or Y
0.05-0.15% and Hf 0.05-0.10% and La 0.05-0.10% Ni remainder and
production-related impurities
2. Nickel-based alloy in accordance with claim 1, comprising, in %
by weight: Al 1.2-<2.0% Si 1.2-<1.8 C 0.001-0.05% S
0.001-0.05% Cr 0.03-0.1% Mn 0.03-0.1% Cu max. 0.1% Fe 0.02-0.2% Mg
0.005-0.06% Pb max. 0.005% Y 0.10-0.15% and Hf 0.05-0.10% Ni
remainder and production-related impurities
3. Nickel-based alloy in accordance with claim 1, comprising, in %
by weight: Al 1.2-<2.0% Si 1.2-<1.8 C 0.001-0.05% S
0.001-0.05% Cr 0.03-0.1% Mn 0.03-0.1% Cu max. 0.1% Fe 0.02-0.2% Mg
0.005-0.06% Pb max. 0.005% Y 0.10-0.15% and La 0.05to 0.10% Ni
remainder and production-related impurities
4. Nickel-based alloy in accordance with claim 1, further
comprising, in % by weight: Al 1.2-<2.0% Si 1.2-<1.8 C
0.001-0.05% S 0.001-0.05% Cr 0.03-0.1% Mn 0.03-0.1% Cu max. 0.1% Fe
0.02-0.2% Mg 0.005-0.06% Pb max. 0.005% Y 0.10-0.15% and Hf
0.05-0.10% and La 0.05-0.10% Ni remainder and production-related
impurities
5. Nickel-based alloy in accordance with any of claims 1 through 4,
further comprising, in % by weight: Al 1.2-1.5% Si 1.2-1.5%
6. Nickel-based alloy in accordance with any of claims 1 through 4,
further comprising, in % by weight: Mg 0.008-0.05%
7. Nickel-based alloy in accordance with any of claims 1 through 4,
further comprising, in % by weight: Y+Hf 0.11-0.18%
8. Nickel-based alloy in accordance with any of claims 1 through 4,
further comprising, in % by weight: Y+La 0.11-0.18%
9. Nickel-based alloy in accordance with any of claims 1 through 4,
further comprising, in % by weight: Y+Hf+La 0.18-0.22%
10. Nickel-based alloy in accordance with any of claims 1 through,
further comprising, in % by weight: Y+Mg 0.11-0.13%
11. A spark plug electrode comprising the nickel-based alloy in
accordance with any of claims 1 through 4.
Description
BACKGROUND OF THE INVENTION
[0001] The invention relates to a nickel-based alloy having
silicon, aluminum, and reactive elements as alloy components.
[0002] Nickel-based alloys are used inter alia for producing
electrodes for ignition elements in internal combustion engines.
Two damaging mechanisms affect the wear of such electrodes,
specifically high temperature corrosion and spark erosion.
[0003] Wear from high temperature corrosion can be determined by
measuring losses in weight and using metallographic examinations
after exposure to pre-specified testing temperatures.
[0004] Spark erosion is combustion of material that is caused by
ignition sparks. With each flashover, a limited volume of electrode
material is melted and in part evaporated.
[0005] The type of oxide layer formation is particularly
significant for both damaging mechanisms.
[0006] Different alloy elements for nickel-based alloys are known
for attaining optimum oxide layer formation for the specific
application. Thus, for instance, aluminum has a positive effect on
oxide layer formation. It is also known that reactive elements can
improve the adhesion of the oxide layer that forms and can increase
life cycle.
[0007] Known from GB-A 2031950 is a nickel alloy comprising (in %
by weight) about 0.2 to 3% Si, about 0.5% or less Mn, at least two
metals selected from the group comprising about 0.2 to 3% Cr, about
0.2 to 3% Al, and about 0.01 to 1% Y, and the remainder nickel.
[0008] DE-A 102 24 891 suggests an alloy that is based on nickel
and that has (in % by weight) 1.8 to 2.2% silicon, 0.05 to 0.1%
yttrium and/or hafnium and/or zirconium, 2 to 2.4% aluminum, and
the remainder nickel. It is very difficult to process such alloys
given the high aluminum and silicon content and they are thus not
well suited for use on an industrial scale.
SUMMARY OF THE INVENTION
[0009] The object of the inventive subject-matter is to provide a
nickel-based alloy that can be used to increase the life cycle of
components produced therefrom by increasing resistance to spark
erosion and oxidation while simultaneously providing good
formability and weldability.
[0010] This object is attained using a nickel-based alloy that
contains (in % by weight): [0011] Al 1.2-<2.0% [0012] Si
1.2-<1.8 [0013] C 0.001-0.1% [0014] S 0.001-0.1% [0015] Cr
0.03-0.1% [0016] Mn 0.03-0.1% [0017] Cu max. 0.1% [0018] Fe
0.02-0.2% [0019] Mg 0.005-0.06% [0020] Pb max. 0.005% [0021] Y
0.05-0.15% and Hf 0.05-0.10% or [0022] Y 0.05-0.15% and La
0.05-0.10% or [0023] Y 0.05-0.15% and Hf 0.05-0.10% and La
0.05-0.10% [0024] Ni remainder and production-related
impurities
[0025] Preferred alternative embodiments of the inventive
subject-matter are as follows.
[0026] Nickel-based alloy having (in % by weight): [0027] Al
1.2-<2.0% [0028] Si 1.2-<1.8 [0029] C 0.001-0.05% [0030] S
0.001-0.05% [0031] Cr 0.03-0.1% [0032] Mn 0.03-0.1% [0033] Cu max.
0.1% [0034] Fe 0.02-0.2% [0035] Mg 0.005-0.06% [0036] Pb max.
0.005% [0037] Y 0.10-0.15% and Hf 0.05-0.10% [0038] Ni remainder
and production-related impurities
[0039] Nickel-based alloy having (in % by weight): [0040] Al
1.2-<2.0% [0041] Si 1.2-<1.8 [0042] C 0.001-0.05% [0043] S
0.001-0.05% [0044] Cr 0.03-0.1% [0045] Mn 0.03-0.1% [0046] Cu max.
0.1% [0047] Fe 0.02-0.2% [0048] Mg 0.005-0.06% [0049] Pb max.
0.005% [0050] Y 0.10-0.15% and La 0.05 to 0.10% [0051] Ni remainder
and production-related impurities
[0052] Nickel-based alloy having (in % by weight): [0053] Al
1.2-<2.0% [0054] Si 1.2-<1.8 [0055] C 0.001-0.05% [0056] S
0.001-0.05% [0057] Cr 0.03-0.1% [0058] Mn 0.03-0.1% [0059] Cu max.
0.1% [0060] Fe 0.02-0.2% [0061] Mg 0.005-0.06% [0062] Pb max.
0.005% [0063] Y 0.10-0.15% and Hf 0.05-0.10% and La 0.05-0.10%
[0064] Thus, there are three conceivable variants in terms of the
reactive elements, specifically: [0065] Y+Hf [0066] Y+La and [0067]
Y+Hf+La
[0068] The inventive nickel-based alloy can preferably be used as a
material for electrodes for spark plugs in gasoline engines.
[0069] Selectively adjusting the elements Al, Si, Cr, Mn, and Mg,
as well as the reactive elements Y, Hf, La in their respective
combinations can bring about an increased life cycle for electrode
materials by increasing the spark erosion resistance and oxidation
resistance while simultaneously promoting formability and
weldability.
[0070] The element Mg is particularly important in terms of binding
sulfur so that in this case it is possible to selectively adjust
low sulfur content in the inventive nickel-based alloy.
[0071] Preferred aluminum content (in % by weight) ranges from
1.2-1.5%.
[0072] Preferred silicon content (in % by weight) ranges from
between 1.2 and 1.8%, in particular 1.2 and 1.5%, while the
preferred Mg content (in % by weight) is adjusted between 0.008 and
0.05%.
BRIEF DESCRIPTION OF THE DRAWINGS
[0073] FIGS. 1 and 2 are plots of the results of laboratory
tests.
DETAILED DESCRIPTION OF THE INVENTION
[0074] The table compares five inventive laboratory batches to two
industrial batches belonging to the prior art.
[0075] Laboratory batch 1132 is an example in which the reactive
elements Y+Hf are provided in the inventive nickel-based alloy.
[0076] Laboratory batch 1140 is an example in which the reactive
elements Y+La are present in the inventive alloy.
[0077] Laboratory batches 1141 and 1142 disclose examples in which
Y+La+Hf were adjusted as reactive elements in the inventive
nickel-based alloy.
TABLE-US-00001 Ele- LB LB LB LB ment 1132 1140 1141 1142 NiCr2MnSi
NiAl1Si1Y Ni 96.83 96.91 96.89 96.79 96.24 97.56 Si 1.47 1.36 1.36
1.42 0.49 0.96 Al 1.38 1.43 1.44 1.40 0.02 0.98 Zr Y 0.15 0.12 0.14
0.13 0.17 Hf 0.08 0.078 0.073 La 0.09 0.096 0.096 Ti 0.1 0.01 0.01
C 0.002 0.006 0.004 0.003 0.003 0.03 S 0.002 0.002 0.002 0.002
0.002 0.002 Co 0.04 0.05 Cu 0.01 0.01 Cr 0.04 0.03 0.06 0.04 1.57
0.01 Zr 0.01 Mg 0.02 0.03 0.01 0.03 0.02 0.04 Mn 0.06 0.03 0.03
0.06 1.48 0.02 Fe 0.03 0.03 0.03 0.04 0.08 0.13 Pb 0.001 0.001
[0078] FIGS. 1 and 2 depict weight loss examinations for the alloys
in accordance with the table at temperatures of 900.degree. C. and
1000.degree. C.
[0079] At just 900.degree. C. the two comparison alloys exhibit
flaking of the previously constructed oxide layer. Although this
also occurs with the inventive alloys at 1000.degree. C., it does
not occur to the same extent as in the comparison alloys.
* * * * *